Off-bearing mechanism for sawmills



N0. 752,440. V PATENTED FEB. 16, 1904. B. T. DAVIES.

v OPP-BEARING MECHANISM FOR SAWMILLS. APPLIUATION FILED SEPT. 14, 1903.

H0 MODEL.

3 SHEETS-SHEET 1.

W/ TNESSES. IN VENTOH 1 I gig w I Q Zya7z Iliap'z'ea B) M M ATTORNEYS No 752,440. PATENTED FEB. 16, 1904.

E. T. DAVIES.

OFF-BEARING MECHANISM FOR SAWMILLS. APPLICATION FILED SEPT. 14, 1903.

no MODEL, I s sums-snsm 2.

A rromv rs m: Norms vs' zns cu, vHmouv-Q, WASHINGYOH, u. c.

Patented February 16, 1904:. I

- UNiTED STATE-s Z PATENT 1 OFFICE,

EVAN THo A's DA'vIns', or roarniiivnfonneon,

OFF-BEARING: inso e smelt i-o 'sawmlLLs SPECIFICATION forming part'of Letters PatentNo. 752,440, dated February 16, 1904.

' npplication filedsepteinber14,1903. Serial No. 173,099. (smear To all whom, it may concern.-

Be it known that LEvAN THOMAS DAvIss,,a citizen ofthe United States, and a resident of Portland, in the county of Multnoinah and State of Oregon, have invented new and useful Improvements in Ofi-Beafing Mechanisms for Sawmills, of which the following-is a full, clear, and exact description. I,

This invention relates to certain novel and useful improvements in attachments for saw,- mills, and has particular application to an improved-mechanical oif-bearerfortransferring and loading lumber upon the conveying devices of the mill after the plank or board has been separated or sawed from the cant or stick of timber or sawlog.

In the present invention I have particularly inview as an object the provision of an improved mechanism which will engage with the stick or plank as fast as it is sawed by the saw- 1 ing mechanism of the mill and will remove said plankfrom the main block of timber or the cant anddeposit thesame on the carrying a or conveying device ofthe machine or saw- Still another obj ectlof my invention is to provide meansfor piling the sawed sticks or planks upon the mill conveying carriage.

A further object of the invention is to provide a device of the character specifiedwhich' will be exceedingly simple in its construction, positive in its operation, capable of being applied to any of the well-known forms of sawing-mills now in use, and one which may be in- I way being composed ofthe side pieces or bars stalled at comparatively little expense.

7 With these objects and others of a similar nature in. view my invention consists in th construction,combination, and arrangement upon the frame, the construction being such of, parts as is described in this; specification,

delineatedin the accompanying drawings, and

set forth. in the appended claims, V

Reference is to be had to theaccornpanying drawings, forming a part of ,thisispecification,

in whichrsimilar characters of refe'mnceindicate corresponding parts in all theefigurssr i I Figure 1 is a top plan view of portions of. a sawmill having my, improvement applied thereto. Fig. 2 is alongitudinalvertical sectional view of the same, taken on. the, line 2 2;

def Fig. 1. is an enlarged detailview;

partly in. section and partly in elevation, showing clearly the manner of operation of my improved oif-bearing device; and Fig. 4 is a face view, a part being in section, of a lever hereinafter more fully described. 7

Referring now to the accompanying drawings in detail, A'designates the frame of the sawmill or machine, such frame comprising,

essentially, the horizontal beams a a, and the vertical posts or standards of. Mounted upon the upper horizontal beams a, of the frame is the mill-carriage B designed to convey the cant or timber to the saw, which latter may beof any improved or desired type, such as I a band-sawor a rotary saw, said carriage having a knee-block I). At the opposite end of the frame from that upon which the carriage B is supported is a similar carriage 0, having thereon aknee-blockasimilar to the'knee- .block bof the carriage B. Mounted at one end of the frame adjacent to the carriage B is a supporting-frame D, carryingthe live rollers cl, which rollers are actuated by any suitable means, such as the shaft d carrying bevel gear wheels d intermeshing with similar bevcl gear-wheels 1 carried by said rollers, while a similar frame E, supporting rollers a,

' actuated by a shaft e, provided with bevelgearing e intermeshing with gearing e on the rollers,'is arranged at the oppositeend of the machine or adjacent to the carriage C.

Between the track of the carriage B and the track upon which the carriage G travels extendsa runway in the form'of skids, said run- F F, longitudinallyof which bars travel the skid-chains f andf said chains extending over pulleys mounted in suitable positions that the skid-chains travel so as to convey the \flips or planks that have been severed from the-main log fromthe carriage B to the car- ;riage G, or vice versa. f p

In order to remove the flip or plank after a ,kerf' has been cut in the main timber and the planksevered entirely therefrom, I have devised the following mechanism, which is the important feature of my invention: Secured to; the standards or posts a are suitable bearing-brackets,each pair of brackets having a 'or stake 7- have their edge portions inclined or converg'ging, so:v thattheyfigme. to 1 3 8: tively sharp point. Any number of these arms 7 may be employed, together with their operating and connecting devices; butfor the sake of convenience I will describe the construction-of but one' of said barsandjtspperating devices, as it is to beunderstood that such. description will be applicable to any number that maybe found suitable or desirable. The levers 6 and the pointed arm 7 are placed upon a line with the cut or kerf made in the log and are capable of moving--vertir cally, so as to lie in the kerfbetween the can-t or log or the flip when the arm is "moved vertically through the actuation of the levers 6, which actuation is accomplished through the medium of a piston-rod 10, reciprocating -vertically in a cylinder 11 and connected with the v shaft 5 at 10?, which reciprocation ofthe rod may be accomplished by means'of steam, compressed air, or otherwise. A second cylinder 12 is mounted adjacent to the cylinder 11, within which cylinder moves a piston, the rod 13 thereof being connected at one end 14 to one arm, 15, of a bell-crank lever, which arm is secured at 16 to a rock-shaft 17, journaled in the frame A, the other arm, 18, of said lever being pivoted to one end of ahorizontallydisposed rod 19, which rod is at its opposite end connected at 20 to the pointed arm 7.

From the construction so far described as relating to the bar 7 and its operating devices it will be seen that when the levers 6 have an upward movement imparted thereto through the vertical movement of the piston-rod 10-; the stake or bar 7 will also have a vertical movement imparted thereto, the bar being designed in such movement toforce its way upward between the cant or log and the plank which has just been severed therefrom bythe saw. When the piston is moved vertically in the cylinder 12, the rock-shaft 17 will be actuated through the arm 15 in such mannerthat the arm 18 will swing backward toward the center of the frame and" away from-the carriage carrying thelog, such-movement having a tendency to pull or move the bar 7 upon its pivot in toward the center of-the ma- K chine and away from the log, the pointed end portion of the bar 7 forcing orpushing the; severed plank away from the logand upon. the skid-chains, by which it is carried to: the

pony-mill. If desired, the improved oif b'ear ing mechanism can be arranged to'trlp the;

flip or plank down flat upon the rollers d andi convey it to the edger or-lumber-trimmer. (Not shown.) It will also be seenby reference to the drawings that the skids at-each side of" the apparatus may each-beraised Inorder to pile or place the lumber or planks through the medium of a vertically-movable rod gof ;a piston working in acylinder g, mounted "on the-frame and connected with a bar g upon the carriages, I employ the following echa ism,-..the partsi fi n h me han ing preferably duplicated-that is to say, the

arrangement adjacent to the carriage B is the 'sarneas that-adjacentto the carriage C, so

that a description of one of the lumber-piling deviceswillbe suficient for both; Pivoted toa bracket 21, mounted upon the frame, is "a relatively long lever 22, the upper portion '23 of which forms a handle, while the lower part is connected at its extremity 24 to a curvedlinkmember -25, bolted: at 26 to the relatively long arm 27' of the angular lever 28, which lever ispivoted at 29 :betweenthe-bars forming the'arnaorwedge 7, as-is-clearly-seen in- Fig-i 4. Totheshort arm 30 of thie lever 28 is pivoted a rod 31; saidrod being also connected at 32 to acurved pusher arm 3'3, pivotallyconnected 'at'34 to the upper end portion 9' of the arm 7," it'being -u-nderstoodthat such curved pusher-arm ispivotallyihungbetween the duplicate bars forming-the arm 7 as seen in Fig 4.

In Fig. 2the-arm 33 isshownin itsnormally inoperative position, the arm7 being shown in use for piling or-bearing the. plank from the carriage tothe conveyer, while in Fig.- 3 I have shown my lumber-piling device in use, I When it: is desired toemploy this lumber-piling device, which isrpresumed to be I00 in-theposition shown in Fig. 2, the handle 23 is pushed forward vtoward the carriage, as shown in Fig.- 3; and ith'elower. end of the. le-

ver 22, pulling =upon the-link 25,actuates the rod 31 through the medium of the lever-. 28 which rod being thrust upward 5 toward the carriage swings the. pusher arm 33 upon its pivot and causes thesame to swing-upward into engagement with the planks. dropping upon the carriagerand push such planksup 110 against theknee-b lock, as clearly. shown in Fig.- 3'. I f

It will be-observedjthatthe mechanism for pilingthe lumber is extremely-simple and one whichisof great assistance-inguiding and di H5 -recting the arrangement of the planks, so that the operation of themill '%will- 1 be continuous withoilt requiring that attention should be ,paid theipath of travel or-to the loading of the planks uponthercarriages; Thechain- 1'20 skids elevate to any convenient height to :properlydeliventhe planks or can-ts upon the sawmill-carriage.

As hereinbefore,stated, any suitablenumberof arms, lever-arms, connections, and pis- .1 5 jtons-for actuating the same; maybe employed --on-thesaw-milli and it is=to be further-understoodthatfor eaeh-oif bearing arm employed there-=is also -provided an-arm-mounted on the rock-shaft, means foroperatingthearm, and 3 I it V V 7 connections between the arm and the ofi-bearing arm. The many advantages incident to a construction of this character will be readily appreciated by those familiar with the art to. which it appertains, as it will be apparent that long heavy pieces of lumber may be easily removed and loaded onto the skid after having been severed from the main log, and, if desired, the lumber may be even loaded back upon the carriage by causing the arms to engage with the outer edges of said plank to force the latter back upon suchcarriage upon the flat side.

While I have shown and described one embodiment of my invention, it will of course be understood that I do not confine myself to the precise details of construction set forth, as there may be modifications and variations in some respects without departing from the spirit of the invention or sacrificing any of the advantages thereof.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In an off-bearing device for sawmills, the combination of a pivoted arm, means for imparting lateral and vertical movements to the arm, and a device for piling material cut in the mill, said device comprising a pusher pivoted at the upper portion of said arm and designed to be moved into engagement with material coming from the mill, and manually-operated means mounted on the frame for actuating the pusher.

2. A device of the class described comprising a main frame, a lever pivoted thereto, an arm pivotally connected with said lever, a cylinder and piston-rod for moving said lever to impart vertical movement to the arm, a rockshaft journaled in the frame, a second arm pivoted to the rock-shaft, connections between the second arm and the first-mentioned arm, means for moving the rock-shaft and its arm to cause thefirst-mentioned arm to swing laterally relatively to the frame, a pusher-arm pivotally connected to the first-named arm, and means connected to the pusher-arm and under the control of the operator, for moving said pusher-arm into engagement with planks or the like.

3. The combination of. an off-bearing device including a vertical and laterally-movable tapered arm, a device for piling material cut by the saw of a sawmill, said device including a curved arm pivoted to the tapered arm near ing said arm laterally, a pusher-arm secured to the first-mentioned arm, and means connected with the pusher-arm for moving said pusher-arm into engagement with planks or the like.

5. The combination with a sawmill mechanism, of an off-bearing device carried thereby, said off-bearing device including a vertically-movable arm pivotally secured to the frame of the sawmill mechanism, said arm being formed of a plurality of bars, and means for piling the planks or lumber cut in the mill, said means comprising a pusher-arm pivoted to the vertical movable arm, a lever connected to the frame of the mechanism, a second lever pivoted to the vertically-movable arm, a link connecting the two levers, and a connection between the second-mentioned lever and the pusher-arm, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EVAN THOMAS DAVIES,

Witnesses:

FRANK KIERNAN, THOMAS H. WARD. 

